cars = 100
space_in_a_car = 4.0
drivers = 30
passengers = 90
# 缺少司机的车辆为车数减去司机人数
cars_not_driven = cars - drivers
# 有司机的汽车数量为司机人数
cars_driven = drivers
# 车辆运载空间为有司机的汽车数量与每辆汽车提供空间的乘积
carpool_capacity = cars_driven * space_in_a_car
# 每辆汽车平均载客量为乘客人数除以有司机的汽车数量
average_passengers_per_car = passengers / cars_driven


print ("There are", cars, "cars available.")
print ("There are only", drivers, "drivers available.")
print ("There will be", cars_not_driven, "empty cars today.")
print ("We can transport", carpool_capacity, "people today.")
print ("We have", passengers, "to carpool today.")
print ("We need to put about", average_passengers_per_car, "in each car.")
